Respuesta :

Answer:

x^4 + 2x^3 - 7x^2 - 8x + 12.

Step-by-step explanation:

In factor form this is (x - 1)(x - 2)(x + 2)(x+ 3)

= (x^2 - 3x + 2)(x^2 + 5x + 6)

= x^4 + 5x^3 + 6x^2 - 3x^3 - 15x^2 - 18x + 2x^2 + 10x + 12

= x^4 + 2x^3 - 7x^2 - 8x + 12.

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